A skin ulcer is a break in the continuity of skin with loss of tissue often without a tendency to heal spontaneously [1]. The ulcer may be superficial involving only the epidermis or can be deep involving layers of the epidermis and the dermis. Acute onset ulcers e.g. surgical wounds tend to heal in a predictable manner - inflammation is followed by granulation, re-epithelialization, and remodeling [2]. Chronic ulcers, however, have a prolonged phase of inflammation [3]. Chronic skin ulcers can be classified based on their etiology as arterial, hematologic, hypertensive, infectious, malignant, neurotropic, venous or drug related e.g. chemotherapy agents [1] [4] [5].

A skin ulcer can have variable presentations. Acute onset skin ulcers present as painful wounds; ulcers in diabetic patients present as a non-painful, long-standing often discharging wound usually in the lower extremity and decubitus (pressure) ulcers may be noted incidentally in bed-ridden patients. Secondary bacterial colonization of the skin ulcer can lead to foul-smelling discharge which can progress to osteomyelitis and gangrene. Discharging skin ulcers are often associated with contact or irritant dermatitis due to the discharge or the dressing material used to treat the ulcer. Lower extremity skin ulcers and decubitus ulcers limit patient mobility while chronic non-healing ulcers can lead to psychological issues like isolation and depression.

Diagnosis of a skin ulcer, especially a chronic non-healing ulcer necessitates consultation with several medical specialists e.g. internist to diagnose the medical comorbidities, dermatologist, and surgeons [6]. The workup begins with a detailed history about the ulcer onset, duration, progression, aggravating and relieving factors and associated medical comorbidities like diabetes, varicosities, autoimmune/infectious diseases and malignancy.

A comprehensive physical examination focusing on the ulcer and its surrounding area should be carried out. In the case of lower extremity ulcers, one must examine peripheral pulses, sensations and look for varicosities. Skin ulcers can be often be identified based on their characteristic appearance: thrombotic ulcers have eschar and areas of necrosis; pyoderma gangrenosum have violaceous, undermined borders while a reddish yellow plaque around the ulcer is suggestive of necrobiosis lipoidica diabeticorum (NLD), an ulcer associated with diabetes [6].

Laboratory workup should include complete blood count, urinalysis, metabolic panel, and tests to diagnose underlying autoimmune causes of skin ulceration. A wound swab from the ulcer has to be obtained for microbiology and antibiotic sensitivity testing. Radiological tests like simple X-rays, bone scan or magnetic resonance imaging may be required in deep ulcers to detect osteomyelitis and doppler studies may be necessary for thrombotic/venous ulcers to detect vascular problems. Biopsy of a chronic skin ulcer has to be performed, especially if there is a suspicion of malignant transformation e.g. Marjolin's ulcer.

Treatment of skin ulcers focuses on promoting healing, preventing infection, and addressing the underlying cause. This may include cleaning the wound, applying dressings, and using topical or oral antibiotics if an infection is present. Compression therapy is often used for venous ulcers, while offloading pressure is crucial for diabetic foot ulcers. In some cases, surgical intervention may be required to remove dead tissue or improve blood flow.

The prognosis for skin ulcers depends on the underlying cause, the patient's overall health, and the promptness of treatment. With appropriate care, many ulcers can heal completely, although some may take weeks or months. Chronic ulcers may recur, especially if the underlying condition is not managed effectively. Complications such as infections or tissue necrosis can worsen the prognosis.

Skin ulcers can result from various causes, including poor circulation (as seen in venous or arterial ulcers), prolonged pressure (pressure ulcers), or neuropathy (diabetic ulcers). Other factors like infections, trauma, or autoimmune diseases can also lead to ulcer formation. Identifying the etiology is essential for targeted treatment and prevention of recurrence.

Skin ulcers are a common health issue, particularly among older adults and individuals with chronic conditions like diabetes or vascular diseases. Venous ulcers are the most prevalent type, affecting up to 1% of the population. Pressure ulcers are common in hospitalized or immobile patients, while diabetic ulcers are a significant concern for those with diabetes.

The pathophysiology of skin ulcers involves a disruption in the normal healing process. Factors such as poor blood supply, pressure, or nerve damage can impede healing, leading to tissue breakdown. Inflammatory responses and infections can further complicate the healing process, resulting in chronic, non-healing ulcers.

Preventing skin ulcers involves managing risk factors and maintaining healthy skin. For individuals at risk, regular skin inspections, proper hygiene, and moisturizing can help. Managing underlying conditions like diabetes or vascular diseases is crucial. For those prone to pressure ulcers, frequent repositioning and using supportive surfaces can reduce risk.

Skin ulcers are open sores that can result from various underlying conditions. They require careful diagnosis and treatment to promote healing and prevent complications. Understanding the cause is key to effective management and prevention. With appropriate care, many ulcers can heal, although some may become chronic or recurrent.

If you have a skin ulcer, it's important to keep the area clean and follow your healthcare provider's instructions for care. Report any signs of infection, such as increased redness, swelling, or pus, to your doctor. Managing any underlying health conditions and maintaining good skin care practices can help prevent ulcers from developing or worsening.

1. Greer N, Foman NA, MacDonald R, et al. Advanced Wound Care Therapies for Non-Healing Diabetic, Venous, and Arterial Ulcers: A Systematic Review. Washington (DC): Department of Veterans Affairs, 2012; VA Evidence-based Synthesis Program Reports
2. Frank C, Bayoumi I, Westendorp C. Approach to infected skin ulcers. Can Fam Physician. 2005 Oct 10; 51 (10): 1352 -1359
3. International Wound Bed Preparation Advisory Board, Canadian Chronic Wound Advisory Board. Sibbald RG, Orsted H, Schultz GS, Coutts P, Keast D. Preparing the wound bed 2003: focus on infection and inflammation. Ostomy Wound Manage. 2003;49(11):23–51.
4. Huljev D. Contemporary management of leg ulcer. Acta Med Croatica 2012; 66(5):387-95
5. D'Epiro S, Salvi M, Luzi A, et.al. Drug cutaneous side effect: focus on skin ulceration. Clin Ter. 2014; 165(4): e323-329.
6. Panuncialman J, Falanga V. Unusual causes of cutaneous ulceration. Surg Clin North Am. 2010 Dec; 90(6): 1161 -1180